Then dont build a base on a pvp server. Be on for raid times or play with a team that will be. I just defended a base last week 10 of us vs 20 people. Thats not an exageration.
Dont want to be on for raid? Well find a good stash spot or body vault.
Yes body vault. I wish it wasnt a thing but it is and thats just how conan exilea pvp is.